The impact of multi-year straw and green fertiliser application on grain yields in a grain steam crop rotation

Abstract

The research proves the advantage of the direction of biological farming using agrocenosis bioresources (straw and green manure) as fertiliser. These studies were carried out in a field stationary experiment of the agrochemical service. Regular application of fertilisers showed a stable tendency to increase grain crop yields. At applying straw with nitrogen for 20 years, the yield increase is reliable 5.0 c/ha (26.8%). The application of green manure fallow on the background of regular application of straw provided an increase in grain yield by 3.6 c/ha (20.6%), which is also significantly higher than the application of straw alone without nitrogen, which provided a steady trend of the average annual increase in yield by 1.1 c/ha (6.3%). Over four rotations (2000-2019) of grain and fallow crop rotation in the conditions of the Tomsk region, there is increasing efficiency of green manure fallow and regular use of straw as a fertiliser. This efficiency leads to the preservation of soil fertility and increased grain crop yields compared with pure fallow. In the first rotation, the grain yield in these variants was at the same level. In the second rotation, the outcome after green manure fallow was higher by 11.7% than after pure fallow. In the third rotation, the yield was 18% higher. In the fourth rotation, the green manure fallow was better than pure fallow in grain yield by 40%. The results were statistically processed by analysis of variance using SNEDEKOR software.